Julio Lopez as a figure, from the Firefly with Julio Lopez toy
SPECIES Human
PHOTO Firefly with Julio Lopez

ENCYCLOPEDIA / CHARACTERS

HUMAN - M.A.S.K.

Julio Lopez

Julio Lopez, codename Doc, is the team's cryptography and foreign-language expert and a physician by trade. He drives Firefly, an orange Volkswagen dune buggy that becomes a jet, and wears the Streamer mask. Graeme McKenna voices him.

SPECIES Human
01

Bio

Julio Lopez, codename Doc, is the team's cryptography and foreign-language expert and a physician by trade. He drives Firefly, an orange Volkswagen dune buggy that becomes a jet, and wears the Streamer mask. Graeme McKenna voices him.

Julio Lopez is the team’s cryptography and language specialist, and he practises as a physician. Graeme McKenna voices him.

His vehicle is Firefly, an orange Volkswagen dune buggy that becomes a jet. One episode calls it Dragonfly, an inconsistency fans note. His mask, Streamer, fires glue, fire-suppressant foam or oil. Firefly arrives in the cartoon in episode 49 and was part of the second Kenner series with a Julio Lopez figure.

A later vehicle is Fireforce, a 1987 Pontiac Fiero that splits into a glider and a three-wheeled attack motorcycle; its mask, New Streamer, creates a holographic clone.

His codename Doc fits the medical day job. The agent roster names him among those who join after the first wave of agents, together with Calhoun Burns, Jacques LaFleur and Ace Riker.

Masks worn

  • StreamerFires glue, oil or fire-suppressing foam.

All masks in the encyclopedia

06

Common questions

Which toys feature Julio Lopez?
Firefly with Julio Lopez from Series 2, Fireforce with Julio Lopez from Series 4, and a Europe-only Julio Lopez and Calhoun Burns paired release.
Why is he called Doc?
He is a physician by trade, and the cartoon uses that skill in episodes such as The Everglades Oddity.
Is Firefly ever called Dragonfly?
Yes, one episode uses the other name, and fans note it. The cause is not documented in the sources we use.
Who voices Julio?
Graeme McKenna.

Sources: List of M.A.S.K. toys and characters (Wikipedia), The Best of the 1980s: M.A.S.K. (Fandom), M.A.S.K. cartoon information and voice cast (matt-trakker.com), M.A.S.K. Series Two 1986 (The Toy Collectors Guide), Julio Lopez (M.A.S.K. Wiki, Fandom)

03

Vehicles

03

Related Characters

Julio Lopez Toys

View all →

3 toys tied to Julio Lopez. The full Kenner and Hasbro list is in the toy archive.

Firefly with Julio Lopez Kenner

Kenner

Firefly with Julio Lopez

Kenner Series 2 (1986)

Fireforce with Julio Lopez Kenner

Kenner

Fireforce with Julio Lopez

Kenner Series 4 Split Seconds (1987)

Julio Lopez and Calhoun Burns Two-Pack Kenner

Kenner

Julio Lopez and Calhoun Burns Two-Pack

Kenner Action Figure Two-Packs (1986)

Retailer links on this page are paid links.

Episode Appearances

All appearances →